Answer:
Step-by-step explanation:
Answer:
Total Cost = $1.47
Step-by-step explanation:
Length of the wooden board = 
Cost of the wooden board = $0.25 per foot
Total Cost = Cost per foot X Total Length in foot
= 
Total Cost = $1.47
The question does not appear sorry
The value of –3mn + 4 = –3 when m = 2 and n = 4 is –20
Solution:
Given expression is –3mn + 4 = –3.
To find the value of –3mn + 4 = –3 when m = 2 and n = 4.
⇒ –3mn + 4 = –3
Add 3 on both sides of the equation.
⇒ –3mn + 4 + 3 = –3 + 3
⇒ –3mn + 7 = 0
Substitute m = 2 and n = 4
⇒ –3 × 2 × 4 + 7
Using BODMAS rule first do the multiplication.
⇒ –6 × 4 + 4
⇒ –24 + 4
⇒ –20
Hence the value of –3mn + 4 = –3 when m = 2 and n = 4 is –20.
1) a=16
a is 16 because 16/4 is 4. 2 plus 4 is 6
